1 /* 2 * Copyright (C) 2022 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.google.android.chre.utils.pigweed; 17 18 import static android.hardware.location.ContextHubManager.AUTHORIZATION_DENIED; 19 import static android.hardware.location.ContextHubManager.AUTHORIZATION_GRANTED; 20 21 import android.content.Intent; 22 import android.hardware.location.ContextHubIntentEvent; 23 import android.hardware.location.ContextHubManager; 24 import android.util.Log; 25 26 import androidx.annotation.NonNull; 27 28 import java.util.Objects; 29 30 import dev.pigweed.pw_rpc.Client; 31 32 /** 33 * Handles RPC events in CHRE intent. 34 */ 35 public class ChreIntentHandler { 36 private static final String TAG = "ChreIntentHandler"; 37 38 /** 39 * Handles CHRE intents. 40 * 41 * @param intent the intent. 42 * @param nanoappId ID of the RPC Server nanoapp 43 * @param rpcClient The Pigweed RPC client 44 * @param channelOutput The ChannelOutput used by Pigweed 45 */ handle(@onNull Intent intent, long nanoappId, @NonNull Client rpcClient, @NonNull ChreChannelOutput channelOutput)46 public static void handle(@NonNull Intent intent, long nanoappId, @NonNull Client rpcClient, 47 @NonNull ChreChannelOutput channelOutput) { 48 Objects.requireNonNull(intent); 49 Objects.requireNonNull(rpcClient); 50 Objects.requireNonNull(channelOutput); 51 52 ContextHubIntentEvent event = ContextHubIntentEvent.fromIntent(intent); 53 54 switch (event.getEventType()) { 55 case ContextHubManager.EVENT_NANOAPP_LOADED: 56 // Nothing to do. 57 break; 58 case ContextHubManager.EVENT_NANOAPP_UNLOADED: 59 rpcClient.closeChannel(channelOutput.getChannelId()); 60 break; 61 case ContextHubManager.EVENT_NANOAPP_ENABLED: 62 // Nothing to do. 63 break; 64 case ContextHubManager.EVENT_NANOAPP_DISABLED: 65 rpcClient.closeChannel(channelOutput.getChannelId()); 66 break; 67 case ContextHubManager.EVENT_NANOAPP_ABORTED: 68 rpcClient.closeChannel(channelOutput.getChannelId()); 69 break; 70 case ContextHubManager.EVENT_NANOAPP_MESSAGE: 71 if (event.getNanoAppId() == nanoappId) { 72 rpcClient.processPacket(event.getNanoAppMessage().getMessageBody()); 73 } 74 break; 75 case ContextHubManager.EVENT_HUB_RESET: 76 rpcClient.closeChannel(channelOutput.getChannelId()); 77 break; 78 case ContextHubManager.EVENT_CLIENT_AUTHORIZATION: 79 if (event.getNanoAppId() == nanoappId) { 80 if (event.getClientAuthorizationState() == AUTHORIZATION_DENIED) { 81 channelOutput.setAuthDenied(true /* denied */); 82 rpcClient.closeChannel(channelOutput.getChannelId()); 83 } else if (event.getClientAuthorizationState() == AUTHORIZATION_GRANTED) { 84 channelOutput.setAuthDenied(false /* denied */); 85 } 86 } 87 break; 88 default: 89 Log.e(TAG, "Unexpected event: " + event); 90 } 91 } 92 } 93